Double handle dumbbell



FIG. 1 is a perspective view of a double handle dumbbell showing my new design;

FIG. 2 is a left elevation view thereof, with the right elevation being a mirror image of the left;

FIG. 3 is a front elevation view thereof, with the back elevation being a mirror image of the front; and,

FIG. 4 is a top plan view thereof, with the bottom plan view being a mirror image of the top. 

CLAIM The ornamental design for a double handle dumbbell, as shown and described. 